Traders assign full implied probability to a 37°C high in Taipei on July 31 because current observations and Central Weather Administration monitoring show temperatures climbing steadily toward that threshold under typical midsummer subtropical conditions. Persistent high pressure, elevated humidity, and the urban heat island effect in the Taipei basin have supported daytime maxima near or at record levels for the season, consistent with July climatology where averages reach 34–35°C. Official forecasts from regional models align closely with this outcome, leaving little room for deviation by resolution time. A sudden influx of convective showers, thicker cloud cover, or a late-day sea breeze could still cap readings below 37°C, though such shifts appear unlikely given the latest guidance.